Tap on the image and keep depressed until a menu apears and choose safe image

Tap on ‘Settings’ icon on the iPad home screen

Tap to select ‘Brightness & Wallpaper’ option on the left column on settings screen

Then tap on image displayed under the ‘saved photos folder’. Now choose if you want winter wool as lock screen or home screen or both

How to change the desktop wallpaper

Launch System Preferences by clicking its icon in the Dock, or by selecting ‘System Preferences’ from the Apple menu.

In the System Preferences window that opens, click the ‘Desktop & Screen Saver’ icon.

Click the ‘Desktop’ tab.

In the left-hand pane you’ll see a list of folders that OS X has pre-assigned for use as desktop wallpaper. You should see Apple Images, Nature, Plants, Black & White, Abstracts, and Solid Colors. You may see additional folders, depending on version of OS X you’re using.